Return to KLUBNL.PL main page
| To: | <[email protected]> |
|---|---|
| Subject: | Re: LF: Better picture of the 807 based 500kHz TX |
| From: | "Graham" <[email protected]> |
| Date: | Wed, 19 Dec 2012 00:14:33 -0000 |
| Importance: | Normal |
| In-reply-to: | <CAKvcm2emxJUnTXkVGUs-PjPbapzATU=9H2Xrc51BWHw4H+m6bQ@mail.gmail.com> |
| References: | <CAKvcm2d8JffcrF9E7MojDPtEZVaJGTwxiX6yU0dWUUs0tYYuWQ@mail.gmail.com><[email protected]><CAKvcm2cgFMiw2fkhCXvh+op-35cxQX65F3GsNM7bBEgKee_3QQ@mail.gmail.com><[email protected]><CAKvcm2cwH8j7yVD2p+Qd+EcrMbzURfzbYFe_0K688-F75vBTjQ@mail.gmail.com><[email protected]><CAKvcm2evEerTZqS07BZTUD8acksEv34vLApYU3wnCOGEDHSYMQ@mail.gmail.com><83EEBFC65ED94B0880138E0637A84E24@AGB> <CAKvcm2emxJUnTXkVGUs-PjPbapzATU=9H2Xrc51BWHw4H+m6bQ@mail.gmail.com> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
lol well that config is for linear service , you should have the screen fed via something like 6.8K from the plate supply , with a 0.1 uF decoupling cap , no regulation for class C as the screen voltage will vary as the anode amps / secondary emission changes [ negative resistance type of thing] , you need a 100 ohm 2 watt resistor , shorted with a over wound 8 turn 10 mm id coil directly to the anode as acp , would normally have 50/100 ohms in series with the cathode as auto bias , should the drive fail, or IA = inf very quickly ... starts off with orange anodes by the wire supports , then yellow , then sparks inside , then white anodes , then glass shatters / melts = game over , with cathode keying , looking at a big gap cw key ! Happy days : ) G.. -------------------------------------------------- From: "Dimitrios Tsifakis" <[email protected]> Sent: Tuesday, December 18, 2012 11:46 PM To: <[email protected]> Subject: Re: LF: Better picture of the 807 based 500kHz TX 2012/12/19 Graham <[email protected]>:Why the stabilised screen supply ? G..It's embarassing. I like the glow of VR tubes! :-) 73, Dimitris VK1SV |
| Previous by Date: | Re: LF: Better picture of the 807 based 500kHz TX, Dimitrios Tsifakis |
|---|---|
| Next by Date: | Re: LF: Better picture of the 807 based 500kHz TX, Dimitrios Tsifakis |
| Previous by Thread: | Re: LF: Better picture of the 807 based 500kHz TX, Dimitrios Tsifakis |
| Next by Thread: | Re: LF: Better picture of the 807 based 500kHz TX, Dimitrios Tsifakis |
| Indexes: | [Date] [Thread] [Top] [All Lists] |